Almost 1000 of 1600 extant Jung letters will make up this important file (Vol. II, 1951-61, is scheduled for later in 1973). The correspondence -- addressed mainly to friends and professional colleagues (Herr Professor Freud, J. B. Rhine, Karl Abraham) -- is a rich source of Jungian ideas. Dr. Adler co-edited the Collected Works and Mrs. Jaffe was Jung's secretary during the last years.